pollution

n.污染

politically, politician, politicize, politicize, politicise, politicking, politics, polity, polka, polka dots, poll, poll-tax, pollard, pollen, pollen count, pollinate, pollination, polling, pollster, pollutant, pollute, pollyanna, polo, polo neck, polonaise, poltergeist, poly, poly-, polyandrous, polyandry, polyanthus, polyester, polyethylene, polygamist, polygamous, polygamy, polyglot, polygon, polygonal, polyhedron, polymath,